Cast iron maintenance isn't the wizardry that people make it out to be. A lot of people like to worry about cooking acidic foods on them or washing them with soap, but the fact is that it's basically indestructible technology. The big difference between CI and regular cookware is that to dry it after washing, it's best to heat it dry on the stove (and if you're feeling zesty, rub a thin layer of oil on it with a towel)